Horseshoe-calk-sharpening machine.



G. ARNOLD, JR. HURSESHOE CALK SHARPENING MACHINE.

APPLICATION FILED MAY 21. 1915.

1,173,636. Patented Feb. 29,1916.

2 SHEETS-SHEET l.

INVENTUR THE COLUMBIA PLANOURAPH m WASHINGTON, n. c.

a. ARNOLD, 1R. HORSESHOE CALK SHARPENING MACHINE.

APPLlCATlON FILED MAY 21, 1915. 1,173,636. Patented Feb.29,1916.

2 SHEETSSHEET 2.

INVENTDR.

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UNTTED STATE PATENT @FFTCE.

GESRGE ARNOLD, JR., OF CLEVELAND. OHIO, ASSIGNOR T0 ALEXANDER ARNOLD, 0F

' TOLEDO, OHIO.

HORSESHOE-CALK-SI-IARPENING MACHINE.

Application filed May 21, 1915.

To all whom it may concern:

Be it known that I, Gnonon ARNOLD, Jr, a citizen of the United States, and a resident of Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Horseshoe-Calk-Sharpening Machine; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference be' ing had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates more particularly to a portable grinding tool or machine for use in connection with the sharpening of horse-slice calks.

The object of my invention. is the provision of a simple and efficient hand tool or machine of the character described, which is capable of and particularly intended for use in sharpening the toe and heel calks of a horse-shoe when on the hoof.

A further object of my invention is the provision of a grinding machine of the character described, which is adapted to grip and act on horse-shoe calks of different sizes and styles, thereby enhancing its c mmercial practicability and broadening its scope of use.

Further objects and advantages of the invention will be apparent from the following detailed description thereof.

The invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of a machine embodying my invention in operative engagement with the toe calk of a horse-shoe. Fig. 2 is a plan view of the machine. Fig. 3 is an enlarged perspective view of one of the clamping jaws. Fig. 4: is a plan view of the machine in engagement with a toe oalk of a shoe and showing the body frame of the machine and the grinding wheel swung to one side of their normal position with respect to the calk clamping parts and operating handles to place the grinding Specification of Letters Patent.

Patented Feb. 29, 1916.

Serial No. 29,879.

wheel in position to act on an end portion of a toe calk, and Fig. 5 is a front elevation of the machine.

Referring to the drawings, 1 designates the body frame or holder of the machine, which frame is of elongated form transversely of the machine and has its top recessed, as at 2. A plate 3 is disposed over the top of the frame 1 to close the top of the recess 2, and is secured to the frame by a plurality of screws 1, or in any other suitable manner. Projecting downward from the under side of the frame 1 near each end thereof is a bearing boss 5, the journal receiving opening of which eXtends through the bottom of the frame 1 and opens into the recess 2 thereof. A shaft 6 is journalec in each bearing boss 5 and has its upper end projecting into the respective end portion of the frame recess 2 and fixedly carrying a segmental gear 7 within the recess. The outer or opposite end of each shaft 6 is provided with an arm 8, which extends forward and downward therefrom, as shown. The two arms 8, 8 project in the same general direction from the shafts 6, 6 with respect to the frame 1 and are connected at their free ends by a pair of work gripping bars 9, 9. Each of the bars 9 is pivctally carried at one end by a different one of the arms 8. which projects through an opening 10 in the bar, and is carried at its opposite end by the other arm for limited movements transversely of the arm by reason of the arm end projecting into a longitudinally disposed slot 11 in the bar end. It is thus evident that the arms 8 are permitted to have relative movements toward and away from each other to effect a relative lengthwise movement of the bars 9. The bars 9 are intended to act as cooperating jaw memers and for such purpose each is provided near the pivoted end thereof with a set of stepped teeth 12 in opposing gripping relation to the corresponding teeth of the other. The arranging of the teeth 12 in stepped form enables the work or calks of different widths to be clamped by the bars 9. For instance, the smallest work piece for which the machine is adapted may be clamped between the inner pair of teeth 12 of the jaws, a Work piece of a little larger size may be clamped between the next pair of teeth, and so on, for different sizes of work.

The swinging movements of the jaw-carrying arms 8 relative to the frame are controlled by a pair of handles 13, which lap each other at their inner ends in the manner of scissor handles and have such lapped ends projected into the frame recess 2 through the rear Wall thereof in transverse relation to the shafts 6 and pivoted together and to the frame 1 within the recess by a screw 14, or in any other suitable manner, and intermediate the segmental gears 7. Each handle 13 has a gear segment 15 pro jecting from a side ec ge thereof in position to mesh with a respective segmental gear 7. The connection between the handles 18 and segmental gears 7 is preferably such that a movement of the handles toward each other will effect an inward relative swinging or the jaw carrying arms 8, and a consequent gripping or releasing of a work piece by the teeth on the bars 9.

Projecting, in the present instance, from the forward side of the frame 1 are bearing bosses 16, 16, in which a shaft 17 is journaled in parallel relation to the frame 2111C! at right angles to the shafts 6. The shaft 17 carries a pair of pendant arms 18, one of which has a split bearing in engagement with the shaft and adjustably clamped thereto by a thumb screw 19, or in any other suitable manner. The free ends of the arms 18 are connected by a bearing sleeve 20 in which a shaft 1 is journaled for free rotary movements in parallel relation to the shaft 17. The shaft 21 carries a grinding wheel 22 of carborundum, or other suitable abrading material, at the end thereof which is disposed near the center of the machine, and, in the present instance, has its opposite end adapted, as at 23, for coupling to a flexible drive shaft (not shown). -The pendant arms 18 and bearing sleeve 20 form a swinging yoke, which, in the present instance, straddles one of the jaw carrying arms 8 with the sleeve part 20 disposed below and at the rear of such arm. The grinding wheel 22 is positioned to adapt it when swung forward to have grinding engagement at its lower forward edge portion with a work piece engaged by the clamping bars 9. A coiled spring 24 is mounted on the shaft 17 and has one end fixedly engaged to one of the bearing bosses 16 and its other end engaged to a pin on the shaft 17 whereby it acts to normally retain the yoke and grinding wheel in rearwardly retracted relation to the work clamping bars 9. A control finger 25 projects rearward from the shaft 17 over the top of the frame 1 and terminates at its rear end in position to be pressed downward by the thumb of a hand grasping the handles 13. It is evident that a downward movement of" the finger" 25' Will cause a forward swinging of the grinding wheel 22 against the tension of the spring 24 and into work coacting position.

The arms 8, which carry the work clamping bars 9, are so disposed that they will assume positions practically parallel with each other when in work gripping position, as indicated in the drawings, thus enabling said arms to be swung backward and forward in unison insuch parallel relation by a swinging of the handles 13 in unison relative to the frame 1, which movement is permitted by reason of the handles having a common pivotal connection with the frame and geared connection with the arms 8. The purpose of this swinging movement of the work clamping part relative to the machine frame is to enable the grinding-wheel 22 to act on work of a greater width or lEIlgUl than the width of the wheel, and the purpose of keeping the arms 8 parallel. or substantially parallel, when the clamping bars 9 are engaged to a work piece, is to maintain the grinding-wheel 22 square with the face of the work piece as it is moved from side to side along the same. With the arrangement illustrated in the drawings the grinding-wheel 22 is disposed in central position with respect to the arms 8 when the control handles 13 project substantially at right angles from the frame, and a swinging of the handles in unison to one side of such right angle position will cause a swinging of the work clamping jaws in the same direction with relation to the frame, thereby moving the work piece transversely of the wheel. The series of teeth 12 on each clamping bar is provided so that any width of work piece can be clamped by only a slight movement of the actuating parts, thus preventing the clamping arms 8 from assuming a position which is other than practically parallel when in work clamping position.

The operation of my machine in connection with the grinding of calks of horseshoes for which it is particularly intended is as follows: The operator places the desired pair of jaw teeth 12 at opposite sides of the calk to be sharpened, whether it be a toe or heel calk, and then presses the handles 13 toward each other to place the jaw teeth in gripping or holding engagement with the calk. This having been done he presses down on the finger 25 with his thumb and effects a forward swinging of the rapidly rotating grinding-wheel 2 2, which is driven ice frcm any suitable source of power, into grinding engagement with the adjacent side of the calk. The line of contact of the wheel with the calk is such with respect to the plane of the horse-shoe as to grind the calk in tapered form so as to eflect a sharpening of the outer end thereof. If the edge of the V calk adjacent tothe grinding-wheel. is of greater length than the width of the wheel the operator swings the handles together in first one direction and then the other to communicate a corresponding parallel swinging movement to the work clamping arms 8,. so that the frame 1 and grinding-wheel 22 are moved backward and forward along the face of the calk, as indicated in Fig. 4.

It is apparent that the calks of a shoe may be readily sharpened by the use of this machine without removing the shoe from a horses hoof and that the sharpening opera tion is accomplished in an easy. rapid and efficient manner, thereby especially adapting the machine for use in stables and obviating the necessity of calling a blacksmith or taking horses to a blacksmith shop to have the calks of the shoes thereof sharpened.

I wish it understood that my invention is not limited to any specific construction, arran ement or form of the parts, as it is capable of numerous modifications and changes without departing from the spirit of the claims.

Having thus described my invention, what I claim as new, and desire to secure'by Letters Patent, is.

1. In a machine of the class described. a frame. work clamping means and a grinding wheel each carried by said frame, and means operable both to impart work clamping movements to said clamping means and to move the grinding Wheel relative to the clamped work.

2. In a machine of the class described. a frame, work clamping means and a grinding wheel each carried by said frame, and means connected to said frame and operable to impart work clamping movements to said clamping means and to move the clamping means as a unit relative to the frame and grinding wheel.

3. In a machine of the class described. a. frame. work clamping means and a grinding wheel carried by said frame, means connected to said frame and to said clamping means and operable to relatively move the clamping parts of said means to grip or release a work piece and also to impart relative movements to the work clamping means and frame when the former is in clamping engagement with a work piece.

4. In a machine of the class described, a frame, work clamping means and a grinding wheel carried by said frame, said clamping means having relatively movable work clamping parts, and control means operable both to impart work clamping and releasing movements to said work clamping means parts and to swing the clamping means as a unit relative to the frame and grinding wheel.

5. In a machine of the class described, a frame, a work clamping means and a grinding wheel carried by said frame for swinging movements in intersecting planes, and means operable to control both the work clamping and releasing movements of said clamping means and the swinging movements thereof as a unit relative to the frame.

6. In a machine of the class described, a frame, work clamping means and a grinding wheel carried by said frame, a pair of relatively movable control members movably carried by said frame and operable when relatively moved to impart work clamping and releasing movements to said clamping means and when moved as a unit to impart a unitary movement to said clamping means relative to the frame and grinding wheel.

7. In a machine of the class described, a frame, work clamping means movably carried by said frame and having relatively movable work clamping parts, a grinding wheel carried by said frame, and control means carried by said frame and operable to impart work clamping and releasing movements to the work engaging parts of said clamping means and to move said means as a unit relative to the frame and grinding wheel.

8. In a machine of the class described, work clamping means mo able relative to said frame and having relatively movable work engaging and releasing parts, and means operable to impart both unitary and relative movements to the parts of said clamping means.

9. In a machine of the class described. a frame, work clamping means swingingly carried by said frame and having relatively movable work clamping parts, and means operable to impart both wrrk clamping and releasing movements to said clamping parts and to swing the clamping means as a unit relative to the frame.

10. In a machine of the class described. a frame. work clamping means movably carried by said frame and having relatively movable work g ipping arts and a pair oflever members fulcrumed to said frame and having connection with said means, said lever members being operable to impart work clamping and releasing movements to the parts of said means and to move said means as a unit relative to the frame.

11. In a machine of the class described, a frame, work clamping means carried by said frame for unitary movements relative thereto and having relatively movable work clamping parts and a pair of coaxially pivoted lever members carried by said frame and connected to said means and operable to impart unitary movements to said means and work clamping and releasing movements to parts thereof.

12. In a machine of the class described, a frame, work clamping means having parts swingingly carried by said frame and work clamping parts connected to said swinging part, and means carried by the frame and operable to relatively swing said swinging parts to impart work gripping and releasing movements to the work clamping parts and to swing said swinging parts in unison whereby an engaged work piece and the frame may have relative movements.

13. In a machine of the class described, a frame, arms swingingly carried by said frame, cotiperating work gripping parts carried by said arms, and lever members pivotally carried by said frame in connection with said arms and operable to impart relative swinging movements to said arms to move the work clamping parts to engage or release a work piece and also operable to swing said arms and work clamping parts as a unit relative to the frame.

14. In a machine of the class described, a frame, a pair of lever members pivoted to said frame, and work clamping means having parts in geared connection and operable by movements of said lever members to clamp and release a work piece and to move the frame relative to an engaged work piece.

15. In a machine of the class described, a frame, work clamping means and a grinding wheel carried by said frame for movements in intersecting planes, and separate means operable simultaneously or independently by a single hand to control the movement of said clamping means and said wheel.

16. In a machine of the class described, a frame, work clamping means and a wheel carried for relative movements by said frame and a plurality of lever members connected to said frame and operable to simultaneously and independently impart relative -movements to said clamping means and wheel.

17. In a machine of the class described, a frame, work clamping means and a grinding wheel carried for movements in different planes by said frame, and separate means capable of being controlled simultaneously by a single hand, one of said control means being operable to control the movements of the clamping means relative to the frame and the other control means being operable to crntrol the movements of the grinding wheel relative to the frame.

18. In a machine of the class described, a frame, work clamping means carried by said frame for swinging movements relative thereto and f r unitary swinging move ments relatively thereto and having relatively movable work clamping parts, a grinding wheel carried by said frame for swinging movements relative thereto, and separate crntrol means for said clamping means and wheel capable of being operated simultaneously to control the movements of the grinding wheel and the unitary work clamping and releasing movements of the clamping means relative to said frame.

it 1.1. a cl ftl l ss. deserib d-aa frame, work clamping means having parts swinginglycarried by the frame, means operable to control the swinging movements of said parts to release or engage a work piece, and a grinding wheel movably carried by said frame and movable into and out of grinding relation to a work piece clamped by said clamping means.

20. In a mach ne of the class described, a frame, a pair of arms swingingly carried by said frame, work gripping means carried by said arms and operable to engage or release a work piece by relative swinging movements of the arms, hand operated means for controlling the swinging movements of said arms, and means movably carried by the frame for acting on a work piece engaged by said work gripping means.

21. In a machine of the class described, a frame, a pair of arms pivotally carried by said frame and projecting in the same general direction therefrom, work gripp ng membe s connecting said arms, each being pivoted at one end to one arm and slidingly engaged to the other arm, and a pair of handles pivotally carried by said frame and having geared connection with said arms whereby relative movements of the handles impart relative pivotal movements to said arms.

22. In a machine of-the class described, aframe having spaced parallel bearings. shafts mounted in saidbearings, arms projecting in the same general direction from said shafts with respect to said frame, a work clamping bar pivoted at one end to each of said arms and having its opposite end in sliding engagement with the other arm, said bearings having cooperating sets, of jaw teeth, and lever handles pivoted to said frame.

-23. In a machine of the class described,

a portable body frame, shafts journaled in transversely spaced parallel relation in said frame, arms projecting outward and downward from said shafts-in the same general direction relative to the frame, a pair of work clamping bars lapping each other and connecting the free ends of said bars for limited relative reciprocatory movements when said arms are relatively swung, a gear carried by each of said shafts, and a-pair of handles carried by said frame intermediate said gears for coaxial pivotal move-' ments and each handle having its inner end formed with a gear segment for mesh with a respective one of said gears whereby relative movements of the handles will impart relative swinging movements to said arms.

24. A machine of the class described having hand controlled work clamping means and a grinding-wheel movable relative to the clamped work by movements ofsaid means.

25'. .A machine .ofthe class described having a frame, hand controlled work clamping means carried by said frame, a grindingwheel carrying part movably carried by said frame and operable to move the grindingwheel into and out of engagement with a work piece held by said clamping means, said wheel carrying part having a control member disposed in position to be operated by a hand which is in operating engagement with said clamping means.

26. In a machine of the class described, a frame, work clamping means carried by said frame and having a pair of control handles, a drive wheel. and means rotatably carrying said wheel and movably carried by said frame to permit a movement of the wheel into and out of engagement with a work piece carried by said clamping means, said wheel carrying means having a control part disposed adjacent to said pair of handles.

27. In a machine of the class described, a frame, work clamping arms pivotally carried by said frame for swinging movements toward and away from each other and having work engaging parts, means for controlling the pivotal movements of said arms, and a grinding-wheel carried bv said member between said arms and movable into and out of engagement with a work piece held by said arms.

28. In a machine of the class described, a body frame, arms pivotally carried by and projecting in the same general direction from said frame, work clamping means carried by said arm and operable to have work gripping and releasing movements by relative movements of said arms, means operable to relatively move said arms, a swinging frame carried by said body frame and having a control part adjacent to said arm operating means, and a grinding-wheel carried by said swinging frame and movable by movements of the swinging frame into and out of coacting relation to a work piece clamped by said clamping means.

29. In a machine of the class described, a body frame, work clamping means carried by said frame, control means for said clamping means, a swinging frame carried by said body frame and having a control part, and a grinding-wheel carried by said.

swinging frame and movable by said frame into and out of coacting relation with a work piece clamped by said clamping means.

80. In a machine of the class described, a body frame, a swinging frame carried by said body frame and having a control part, a grinding wheel rotatably carried by said swinging frame, swinging arms projecting from said frame at opposite sides of said wheel and having work parts for gripping work in advance of the wheel, and means operable to control the relative work gripping and releasing movements of said arms.

31. In a machine of the class described, a body frame, a swinging frame carried by the body frame and having a control part, means urging a movement of said swinging frame in one direction, a grinding wheel carried by said swinging frame, arms swingingly projecting from said body frame at opposite sides of said wheel and having parts for clamping a work piece in position to be acted on by said wheel when swung from normal position. and hand controlled means carried by said body frame and operable to control the swinging movements of said arms.

32. In a machine of the class described. a po table body frame, a swin ing frame can ried by said body frame and ha ing a control part, a grinding-wheel carried by said swinging frame, means urging a movement of said swinging frame in one direction, clamping members movably projecting from said body frame at opposite sides of sa d wheel and operable to clamp a work piece in position to be acted on by said wheel when swung from normal position, and a pair of handles pivotally carried by said body frame and connected to said arms and operable when relatively moved to impart relative swinging movements to said arms.

33. In a machine of the class described, a body frame, a pair of swinging arms having spaced parallel axes and projecting in the same general direction from said frame, work gripping means carried by said arms, and means carried by said frame and operable to impart relative work gripping and releasing movements to said arms and like parallel movements thereto in unison to move the engaged work piece with respect to the body frame.

34, In a machine of the class described, a frame, arms having spaced parallel swinging axes and projecting in the same general direction from said frame, work gripping means carried by said arms, a pair of control handles in common pivotal connection with said frame, and connection between said handles and arms for imparting relative swinging movements to the arms when the handles are relatively moved and like swinging movements in unison to the arms when the handles are pivotally moved as a unit relative to the frame.

35. In a machine of the class described, a frame, a pair of arms pivotally projecting from said frame for swinging movements about different parallel axes, work clamping means carried by said arms, a pair of control handles carried for coaxial pivotal movements by said frame. geared connection between each of said handles and a different one of said arms, whereby relative pivotal movements of the handles will impart relative swinging movements to said arms and a unitary pivotal movement of the handles relative to the frame will impart like swinging' movements to said arms relative to the frame.

In a machine of the class described,

a frame, work gripping means carried by said frame for swinging movements as a unit relative to the frame and having relatively movable parts which are operable to clamp or release a work piece, means carried by said frame in connection with said work gripping means and operable to impart relative work gripping and releasing movements to said parts and to impart unitary swinging movements to said means relative to the frame, and work coacting means movably carried by said frame for engagement with a work piece held by said gripping means.

37. In a machine of the class described, a frame, work gripping means carried by said frame for swinging movements as a unit relative to the frame and having relatively movable parts which are operable to clamp or release a work piece, means carried by said frame in connection with said work gripping means and operable to impart relative work gripping and releasing movements to said parts and to impart unitary swinging movements to said means relative to the frame, and a grinding wheel rotatably carried by said frame for movement into and out of coaction with a work piece held by said gripping means.

38. In a machine of the class described, a body frame, work gripping means carried by said frame for swinging movements as a unit relative to the body frame and having relatively movable parts which are operable to clamp or release a work piece, means carried by said body frame in connection with said work gripping means and operable to impart relative work gripping and releasing movements to said parts and to impart unitary swinging movements to said means relative to the body frame, a swinging frame'carried by said body frame and iaving a control part, and a work coacting wheel carried by said swinging frame and movable by swinging movements of said Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

frame into and out of engagement with a work piece clamped by said gripping means.

39. In a machine of the class described, a body frame, work gripping means carried by said frame for swinging movements as a unit relative to the body frame and having relatively movable parts which are operable to clamp or release a work piece, means carried by said body frame in connection with said work gripping means and operable to impart relative work gripping and releasing movements to said parts and to impart unitary swinging movements to said means relative to the body frame, a swinging frame carried by said body frame and having a control part extending adjacent to the control means for said gripping means, and a grinding wheel carried by said swinging frame for movements into and out of engagement with a work piece held by said gripping means, and means urging a movement of said swinging frame to normally retain said wheel out of work coacting position.

40. In a machine of the class described, a

body frame, parallel shafts mounted in said body frame, arms projecting in the same general direction from said shafts, means carried by said arms for cooperating to grip work of different sizes, gears carried by said shafts, a pair of handles pivoted to said body frame for movements about a common pivot, each of said arms having a segmental gear at its inner end in mesh with one of said first gears whereby relative pivotal movements of the handles will impart relative swinging movements to said arms and unitary pivotal movements of the handles will impart unitary pivotal movements to said arms, clamping means and a work piece held thereby to move the work piece to cause a backward and forward movement of the work piece in substantially parallel relation to said frame, and means movably carried by said frame and having a work abrading member disposed between said arms and movable into and out of engagement with a work piece clamped by said clamping means.

In testimony whereof, I have hereunto signed my name to this specification.

GEORGE ARNOLD, JR.

Washington, D. C. 

